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OnChangeEventWithSelectDropdown: retarget net10.0, fix @foreach compile bug, add InputSelect example #2088

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Merged
CodeMazeBlog merged 1 commit into from
Aug 13, 2026
+46 −16
Merged

OnChangeEventWithSelectDropdown: retarget net10.0, fix @foreach compile bug, add InputSelect example #2088

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6 changes: 3 additions & 3 deletions ...WithSelectDropdown/OnChangeEventWithSelectDropdown/OnChangeEventWithSelectDropdown.csproj
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">

<PropertyGroup>
<TargetFramework>net7.0</TargetFramework>
<TargetFramework>net10.0</TargetFramework>
<Nullable>enable</Nullable>
<ImplicitUsings>enable</ImplicitUsings>
</PropertyGroup>
Expand All @@ -13,8 +13,8 @@
<ExternalConsole>true</ExternalConsole>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="7.0.7" />
<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="7.0.7" PrivateAssets="all" />
<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="10.0.10" />
<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="10.0.10" PrivateAssets="all" />
</ItemGroup>

</Project>
44 changes: 37 additions & 7 deletions ...eatures/OnChangeEventWithSelectDropdown/OnChangeEventWithSelectDropdown/Pages/Index.razor
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Expand Up @@ -36,16 +36,35 @@
<option value="@topping.Id">@topping.Name +$@topping.Price</option>
}
</select>
<br/>
<span>Fourth topping (InputSelect inside EditForm):</span>
<EditForm Model="order">
<InputSelect @bind-Value="order.ToppingId" @bind-Value:after="RecalculateTotal">
@foreach (var topping in toppings)
{
<option value="@topping.Id">@topping.Name</option>
}
</InputSelect>
</EditForm>
<p>Fourth topping total: $@fourthTotal</p>

@code
{
public record Topping(int Id, string Name, double Price);

public class Order
{
public int ToppingId { get; set; }
}

public string? selectedTopping;
public string? selectedSecondTopping;
public string? selectedThirdTopping;
public static double baseBurgerCost = 5.4;
public double totalCost = baseBurgerCost;
public double grandTotal;
public double fourthTotal;
public Order order = new();

public List<Topping> toppings = new List<Topping>()
{
Expand All @@ -59,26 +78,37 @@

public void HandleChange(ChangeEventArgs args)
{
@foreach (var topping in toppings)
if (!int.TryParse(args.Value?.ToString(), out var id))
{
if (topping.Id == int.Parse(args.Value.ToString()))
{
selectedSecondTopping = topping.Name;
totalCost = Math.Round(baseBurgerCost + topping.Price, 2);
}
return;
}

var topping = toppings.FirstOrDefault(t => t.Id == id);
if (topping is null)
{
return;
}

selectedSecondTopping = topping.Name;
totalCost = Math.Round(baseBurgerCost + topping.Price, 2);
}

public async Task CalculateGrandTotal()
{
await Task.Delay(2000);

@foreach (var topping in toppings)
foreach (var topping in toppings)
{
if (topping.Id == int.Parse(selectedThirdTopping))

Check warning on line 102 in blazor-features/OnChangeEventWithSelectDropdown/OnChangeEventWithSelectDropdown/Pages/Index.razor

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GitHub Actions / Build & test (blazor-features/OnChangeEventWithSelectDropdown) 

Possible null reference argument for parameter 's' in 'int int.Parse(string s)'.

Check warning on line 102 in blazor-features/OnChangeEventWithSelectDropdown/OnChangeEventWithSelectDropdown/Pages/Index.razor

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GitHub Actions / Build & test (blazor-features/OnChangeEventWithSelectDropdown) 

Possible null reference argument for parameter 's' in 'int int.Parse(string s)'.
{
grandTotal = Math.Round(totalCost + topping.Price, 2);
}
}
}

public void RecalculateTotal()
{
var topping = toppings.FirstOrDefault(t => t.Id == order.ToppingId);
fourthTotal = topping is null ? 0 : Math.Round(baseBurgerCost + topping.Price, 2);
}
}
12 changes: 6 additions & 6 deletions ...Dropdown/OnChangeEventWithSelectDropdownTests/OnChangeEventWithSelectDropdownTests.csproj
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<TargetFramework>net7.0</TargetFramework>
<TargetFramework>net10.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>

Expand All @@ -10,11 +10,11 @@
</PropertyGroup>

<ItemGroup>
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
<PackageReference Include="MSTest.TestAdapter" Version="2.2.10" />
<PackageReference Include="MSTest.TestFramework" Version="2.2.10" />
<PackageReference Include="coverlet.collector" Version="3.2.0" />
<PackageReference Include="bunit" Version="1.22.19" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
<PackageReference Include="MSTest.TestAdapter" Version="4.3.3" />
<PackageReference Include="MSTest.TestFramework" Version="4.3.3" />
<PackageReference Include="coverlet.collector" Version="10.0.1" />
<PackageReference Include="bunit" Version="1.40.0" />
</ItemGroup>

<ItemGroup>
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